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Wikipedia Source: Joe Penna Aka Mysteryguitarman Joe Penna, known online as MysteryGuitarMan, is a Brazilian filmmaker. He currently resides in Los Angeles, California. Penna maintains the YouTube channel MysteryGuitarMan. He uploads one or two videos every month. He is a member of the Big Frame network, and participated in the networks BAMMO channel. In January 2011, he was the most subscribed in Brazil. As of September 2014 his channel has over 2.8 million subscribers, and his videos have been viewed over 340 million times. On February 18, 2010, Penna started a second YouTube channel, jp, where he uploads his making-of videos and vlogs. Within 6 hours, it became the third most subscribed channel in Brazil.